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They usually consist of a cartridge containing the nicotine solution, a heating element and a power source for this heating element, usually a rechargeable lithium battery

This makes me confident that e-cigarettes will be the disruptive technology which sees smoking stubbed out for good.

I am a HUGE skeptic, but from what I understand there is nothing harmful in the vapors and they are gone quickly. Dori Studer Greene: I quit smoking cigarettes in October by switching to the vapor cig

The amount of sample available varies a lot depending on the subject, therefore the use of lower or higher amounts of matrix was tested and validated as not affecting precision and accuracy